Towards Ultra-High Efficient Photovoltaics With Perovskite/Crystalline Silicon Tandem Devices

Jérémie Werner, Soo-Jin Moon, Philipp Löper, Arnaud Walter, Miha Filipič, Ching-Hsun Weng, Linus Löfgren, Julien Bailat, Marko Topič, Monica Morales-Masis, Robby Peibst, Rolf Brendel, Sylvain Nicolay, Stefaan De Wolf, Bjoern Niesen, Christophe Ballif

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Perovskite/crystalline silicon tandem solar cells are one of the most promising approaches to reach conversion efficiencies beyond 30% at reasonable costs. In the present paper, we present our research directions and recent results. This includes fundamental studies on the perovskite material properties such as sub-band gap absorption and complex refractive index, as well as the development of a broadband transparent rear electrode. The electrode development enabled the fabrication of semitransparent perovskite cells with efficiencies up to 14.7%, which then translates to four-terminal tandem measurements with total stabilized efficiency of up to 22.8%. Furthermore, we present first results on monolithic perovskite/silicon tandems with total current of 32.25 mA/cm2 on a flat wafer and finally provide optimization guidelines with optical simulations.
Original languageEnglish (US)
Title of host publicationThe 31st European PV Solar Energy Conference and Exhibition
Number of pages6
StatePublished - Sep 14 2015
Externally publishedYes


  • Perovskite Solar Cell
  • Silicon Heterojuction (SHJ) Solar Cells
  • Simulation
  • TCO
  • Tandem


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